LT3433

PRODUCTION

High Voltage Step-Up/Step-Down DC/DC Converter

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $5.54

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Overview

Automatic Step-Up and Step-Down Conversion
Uses a Single Inductor
Wide 4V to 60V Input Voltage Range
V_OUT from 3.3V to 20V
Dual Internal 500mA Switches
100µA No-Load Quiescent Current
Low Current Shutdown
±1% Output Voltage Accuracy
200kHz Operating Frequency
Boosted Supply Pin to Saturate High Side Switch
Frequency Foldback Protection
Current Limit Foldback Protection
Current Limit Unaffected by Duty Cycle
16-lead Thermally Enhanced TSSOP Package

Part Models: 4
1ku List Price: Starting From $5.54

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT3433EFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3433EFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3433IFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT3433IFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products
		PCN26_0072_Form Material_Report
LT3433EFE#PBF	PRODUCTION
LT3433EFE#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report
LT3433EFE#PBF	PRODUCTION
LT3433EFE#TRPBF	PRODUCTION
LT3433IFE#PBF	PRODUCTION
LT3433IFE#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Hot Swap Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit
Ideal Diodes and PowerPath Controllers 1
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
Power System Management (PSM) & Sequencers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement

Tools & Simulations

LTspice 1

LT3433 Demo Circuit - High Voltage Step-Up / Step-Down Converter (5V to 5V @ 125mA)

Models for the following parts are available in LTspice:

LT3433

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LT3433EFE Demo Board | Step-Up/Step-Down Converter, 4V to 60V Input, VOUT = 5V/400mA @ 12VIN

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Product Details

Demonstration circuit 527 is a monolithic step-up/step-down DC/DC switching converter with Burst Mode^™ featuring the LT3433. The board is optimized for 5V output at up to 400mA load current (12V_IN) and an input voltage range of 4V to 60V. The demo board is also useful for buck-only needs and can provide 5V @ 340mA from a 48V input and 5V @ 400mA from a 12V input.